Hansen's Northwest Native Plant Database
Alnus viridis ssp. sinuata (Sitka Alder, Slide Alder)

 

Kingdom

: 

 Plantae – Plants

Subkingdom

: 

 Tracheobionta – Vascular plants

Superdivision

: 

 Spermatophyta – Seed plants

Division

: 

 Magnoliophyta – Flowering plants

Class

: 

 Magnoliopsida – Dicotyledons

Subclass

: 

 Hamamelididae

Order

: 

 Fagales

Family

: 

 Betulaceae – Birch family

Genus

: 

 Alnus Mill. – alder

Species

: 

 Alnus viridis (Chaix) DC. – green alder

Subspecies

: 

 Alnus viridis (Chaix) DC. ssp. sinuata (Regel) A. Löve & D. Löve – Sitka alder

A beautiful shrubby tree, Sitka Alder grows to 15’ tall and 10’ wide.

It is found at high elevations along the coast from central Alaska to California and east across North America in USDA zones 2-8.

In its native habitat this tree is invaluable. It grows quickly to form thickets that provide wildlife habitat. Furthermore, it improves the soil through nitrogen fixation and its rich leaf litter, it stabilizes steep slopes, avalanches rarely damage it and it slows the flow of water during spring snowmelt.

 
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